![]() The specific surface area, volume, and pore size of the carbonized aerogel were studied using nitrogen adsorption at 77 K with an Autosorb iQ automatic analyzer (Quantachrome Instruments, Boynton Beach, FL, USA). The results of the desorption studies showed a very low desorption rate (0.3%) at pH 6.5 and a rate of about 40% in a strongly acidic medium. The experiment results showed that the maximum Pb(II) adsorption capacity of the carbonized aerogel was 185 mg/g (at pH 6.0). ![]() The adsorption capacity of the carbonized material was studied for liquid-phase Pb(II) extraction in static mode. According to the electron images, the highly porous structure of the carbonized composite was preserved. After carbonization, an increase in smaller micropores occurred. It was found that the carbonized aerogel predominantly represented a mesoporous material having a specific surface area of 315 m 2/g. The sample porosity was estimated through nitrogen adsorption at 77 K. The carbonized aerogel was found to preserve the carbon framework structure. Diagnostic assessment of the samples was carried out through X-ray diffractometry, Raman spectroscopy, thermogravimetry, scanning and transmission electron microscopy, and infrared spectroscopy. It was tested as an efficient adsorbent to purify aquatic media from toxic Pb(II). This paper considers the synthesis of a novel nanocomposite based on reduced graphene oxide and oxidized carbon nanotubes modified with polyaniline and phenol-formaldehyde resin and developed through the carbonization of a pristine aerogel.
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